:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}

a:hover {
  color: #535bf2;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow-x: hidden;
}

body {
  min-width: 320px;
  min-height: 100vh;
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
}

#root {
  width: 100%;
  min-height: 100vh;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}

button:hover {
  border-color: #646cff;
}

button:focus,
button:focus-visible {
  outline: 4px auto -webkit-focus-ring-color;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }

  a:hover {
    color: #747bff;
  }

  button {
    background-color: #f9f9f9;
  }
}

/* 3D卡片动画效果 */
@keyframes floatMain {

  0%,
  100% {
    transform: rotateY(-15deg) rotateX(10deg) translateY(0px);
  }

  50% {
    transform: rotateY(-15deg) rotateX(10deg) translateY(-12px);
  }
}

@keyframes floatSecondary {

  0%,
  100% {
    transform: rotateY(15deg) rotateX(5deg) translateY(0px);
  }

  50% {
    transform: rotateY(15deg) rotateX(5deg) translateY(-10px);
  }
}

@keyframes floatThird {

  0%,
  100% {
    transform: rotateY(-5deg) rotateX(2deg) translateY(0px);
  }

  50% {
    transform: rotateY(-5deg) rotateX(2deg) translateY(-8px);
  }
}

/* 3D卡片悬停效果 */
.card-3d:hover {
  transform: rotateY(-20deg) rotateX(15deg) translateY(-15px) scale(1.08) !important;
  box-shadow: 0 45px 90px rgba(0, 0, 0, 0.45), inset 0 3px 0 rgba(255, 255, 255, 0.5) !important;
  animation-play-state: paused !important;
  border: 3px solid rgba(255, 255, 255, 0.4) !important;
}